CVE-2022-48757 (GCVE-0-2022-48757)

Vulnerability from cvelistv5 – Published: 2024-06-20 11:13 – Updated: 2026-05-11 18:46
VLAI
Title
net: fix information leakage in /proc/net/ptype
Summary
In the Linux kernel, the following vulnerability has been resolved: net: fix information leakage in /proc/net/ptype In one net namespace, after creating a packet socket without binding it to a device, users in other net namespaces can observe the new `packet_type` added by this packet socket by reading `/proc/net/ptype` file. This is minor information leakage as packet socket is namespace aware. Add a net pointer in `packet_type` to keep the net namespace of of corresponding packet socket. In `ptype_seq_show`, this net pointer must be checked when it is not NULL.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:10 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 , < 8f88c78d24f6f346919007cd459fd7e51a8c7779 (git)
Affected: 2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 , < be1ca30331c7923c6f376610c1bd6059be9b1908 (git)
Affected: 2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 , < c38023032a598ec6263e008d62c7f02def72d5c7 (git)
Affected: 2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 , < b67ad6170c0ea87391bb253f35d1f78857736e54 (git)
Affected: 2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 , < e372ecd455b6ebc7720f52bf4b5f5d44d02f2092 (git)
Affected: 2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 , < db044d97460ea792110eb8b971e82569ded536c6 (git)
Affected: 2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 , < e43669c77cb3a742b7d84ecdc7c68c4167a7709b (git)
Affected: 2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 , < 839ec7039513a4f84bfbaff953a9393471176bee (git)
Affected: 2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 , < 47934e06b65637c88a762d9c98329ae6e3238888 (git)
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Linux Linux Affected: 2.6.26
Unaffected: 0 , < 2.6.26 (semver)
Unaffected: 4.4.302 , ≤ 4.4.* (semver)
Unaffected: 4.9.300 , ≤ 4.9.* (semver)
Unaffected: 4.14.265 , ≤ 4.14.* (semver)
Unaffected: 4.19.228 , ≤ 4.19.* (semver)
Unaffected: 5.4.176 , ≤ 5.4.* (semver)
Unaffected: 5.10.96 , ≤ 5.10.* (semver)
Unaffected: 5.15.19 , ≤ 5.15.* (semver)
Unaffected: 5.16.5 , ≤ 5.16.* (semver)
Unaffected: 5.17 , ≤ * (original_commit_for_fix)
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                  "lessThanOrEqual": "4.4.*",
                  "status": "unaffected",
                  "version": "4.4.302",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.9.*",
                  "status": "unaffected",
                  "version": "4.9.300",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.14.*",
                  "status": "unaffected",
                  "version": "4.14.265",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.19.*",
                  "status": "unaffected",
                  "version": "4.19.228",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.176",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.96",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.19",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.16.*",
                  "status": "unaffected",
                  "version": "5.16.5",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "5.17",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.4.302",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.9.300",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.14.265",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.19.228",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.176",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.96",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.19",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.16.5",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.17",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix information leakage in /proc/net/ptype\n\nIn one net namespace, after creating a packet socket without binding\nit to a device, users in other net namespaces can observe the new\n`packet_type` added by this packet socket by reading `/proc/net/ptype`\nfile. This is minor information leakage as packet socket is\nnamespace aware.\n\nAdd a net pointer in `packet_type` to keep the net namespace of\nof corresponding packet socket. In `ptype_seq_show`, this net pointer\nmust be checked when it is not NULL."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-04T08:22:27.780Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/8f88c78d24f6f346919007cd459fd7e51a8c7779"
            },
            {
              "url": "https://git.kernel.org/stable/c/be1ca30331c7923c6f376610c1bd6059be9b1908"
            },
            {
              "url": "https://git.kernel.org/stable/c/c38023032a598ec6263e008d62c7f02def72d5c7"
            },
            {
              "url": "https://git.kernel.org/stable/c/b67ad6170c0ea87391bb253f35d1f78857736e54"
            },
            {
              "url": "https://git.kernel.org/stable/c/e372ecd455b6ebc7720f52bf4b5f5d44d02f2092"
            },
            {
              "url": "https://git.kernel.org/stable/c/db044d97460ea792110eb8b971e82569ded536c6"
            },
            {
              "url": "https://git.kernel.org/stable/c/e43669c77cb3a742b7d84ecdc7c68c4167a7709b"
            },
            {
              "url": "https://git.kernel.org/stable/c/839ec7039513a4f84bfbaff953a9393471176bee"
            },
            {
              "url": "https://git.kernel.org/stable/c/47934e06b65637c88a762d9c98329ae6e3238888"
            }
          ],
          "title": "net: fix information leakage in /proc/net/ptype",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-48757",
        "datePublished": "2024-06-20T11:13:36.529Z",
        "dateReserved": "2024-06-20T11:09:39.059Z",
        "dateUpdated": "2025-05-04T08:22:27.780Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.